BIRDS OF ONTARIO. 



41 



(*) (342) Swainson's Hawk. 

 (Buteo swainsoni.) 



A rare visitor from the western prairies, where it is abundant. 



(343) Broad-winged Hawk. 



(Buteo platypterus.) 



A common summer resident, breeds throughout its range. A useful 

 species. 



American Rough-legged Hawk. 

 GENUS ARCHIBUTEO. 



(347) American Rough=legged Hawk. 



(Archibuteo lagopus sancti-johannis.) 



A common visitor in spring and autumn, probably a summer resident 

 in the northern portion of the Province. 



They arrive early in April and the bulk have departed by the end of 

 November. 



One of our most beneficial birds, its food consisting almost entirely 

 of mice and grasshoppers. 



I have found as many as eight meadow mice in the stomach and 

 crop of one of these birds. 



